Volume tank



FIG. 1 is a perspective view of a volume tank showing a new design;

FIG. 2 is a left side view of the volume tank illustrated in FIG. 1;

FIG. 3 is a right side view of the volume tank illustrated in FIG. 1;

FIG. 4 is a bottom view of the volume tank illustrated in FIG. 1;

FIG. 5 is a top view of the volume tank illustrated in FIG. 1;

FIG. 6 is a front view of the volume tank illustrated in FIG. 1; and,

FIG. 7 is a rear view of the volume tank illustrated in FIG. 1. 

CLAIM The ornamental design for a volume tank, as shown and described. 